Miss Chong, 24, said: "We hadn't realised it was such a big day, and I was so worried I wouldn't be able to get a dress."

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Only two other dates this century remain in which the day, month and year will be the same: 11-11-2011 and 12-12-2012.

A spokeswoman for Australian Marriage Celebrants Incorporated, Ann Dally, said there was an unusually high number of weddings booked for next Sunday.

Ms Dally said some celebrants in her organisation had been turning couples away. "A lot of celebrants might only get one wedding a week or one wedding a month but all our members are booked out for this date. I have actually had to turn away about 10 couples."